Quartz-mill.



No. 73mm.

' no MODEL.

J. P. FORWARD.

QUARTZ MILL.

PATENTED AUG. 4, 1903.

N0 MODEL.

PATENTED AUG. 4, 1903. J. F. FORWARD.

QUART-Z MILL.

APPLICATION rum) um. 18, 1902.

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No. 735,234. PATENTED AUG. 4, 1903.

J. F. FORWARD.

QUARTZ MILL. APPLIOATION FILED JAN.'1B, 1902.

no MODEL. s sums-sum a.

To aZZ whom it may concern.-

Patented August 4, 1903.

PATENT OFFicE. 1

JOHN F. FORWARD, OF SAN DIEGO, CALIFORNIA.

QUARTZ-MILL.

SPECIFICATION forming part of Letters Patent No. 735,234, dated August4, 1903. Application filed January 18, 1902. Serial No. 90.337. (Nomodel.)

Beit known that I, J OHN F. FORWARD, a citizen of the United States,residing at San Diego, in the county of San Diego and State ofCalifornia, have invented anew and useful Quartz-Mill, of whichthefollowing is a specification. I

My invention is an improved quartz-mill and it consists in the peculiarconstruction and combination of devices hereinafter fully set forth andclaimed. c

In the accompanying drawings, Figure 1 is a vertical sectional View of aquartz-mill emplan view of my improved quartz-mill.

bodying my improvements. Fig.2 is a detail top plan view, partly insection,'of the adjustable frame and the bearing which is detachablyconnected thereto. Fig, 3 is a top r Fig. 4: is a detail top plan viewof the base. Fig. 5 is a detail top plan View of the fixed conicalgrinding element, showing the channels therein. Fig. 6 isaplanview ofthe upper adjustable frame with a part broken away to show the groovetherein Fig. 7 isa detail plan view of the detachable bearing used inconnection with said top frame. Fig. 8 is a plan View showing the topframe with the bearing supported thereon, but prior tobeing turned toits operative position.- Fig. MS a plan viewshowing the top frame withthe bearing mounted therein readyfor operation.

Figs. 6; 7, 8', and 9 are on asomewhat larger scale than the remainingfigures of the drawmgs. I

In the embodiment of my invention here shown the base 1* is a castingcomprising a central portion 2;radial-arms 3, which extend outwardlytherefrom and are formedwith downwardly-extendingfeet at at their outerends, and side bars 5,which connect the radial arms together and braceand strengthen the same. In the upper side of the hub portion 2, at thecenter thereof, is formed a recess 6, the sides of which arenon-circular, usually angular, as shownin the drawings, and in thecenter of the said central or hub portion is a vertical opening 7, theupper end of "which communicates with said recess. Verticalsupportingcolumns 8 have their lower ends screwed to the outer portions of the-arms-3, and are thereby detachably secured to the base.

A fixed grinding element 9 of conical form, having a grinding-surface 10extending outwardly from the base thereof,is a hollow casting adapted tofit on the central portion 2 of the base and formed with anon-circularlooking projection 11 on its lower side,which fits in the non-circularrecess 6 of the base and is securedthereto by a bolt 12. The said boltpasses through an opening in the lockin g projection and through theopening 7 in the center of the base. Thereby the fixed conical grindingelement may be securely attached to the base, so that it cannot revolvethereon, and yet is adapted to be readily removed from the base when'themill isdisassembled for transportation or for other reasons. The conicalportion of the fixed grinding element is provided with channels 13,which extend from the grinding surface 10 thereof upwardly to near theapex of the cone, and the said channels are deepened and wideneddownwardly, as shown. Q

A revoluble grinding element 14 (here shown as of cylindrical form andwitha cylindrical bore 15) is disposed on and around the fixed grindingelement and is provided at its base with a detachable grinding portion16, which bears upon the grinding-surface 10 of the fixed grindingelement 9. The detachable portion 16 is secured to the main portion ofthe revoluble grinding elementby ears or lugs 17 and bolts 18, as shownin Fig. 1. It will be observed by reference to' the said Fig. 1 that thebore15 forms a downwardlycontracting grinding-space around the conicalportion of the fixed grinding element 9 The revoluble grinding element14: is provided at its upper end with an upwardly-extending tubularfeed-shaft 19, which communicates with the bore 15. p

A vertically adjustable frame 20 (here shown as a segmental casting) isprovided with radial arms 21, having openings at their outer ends toreceive the supporting-columns 8. The upper portions of the latter arescrew-threaded and provided with adjustingnuts 22, which bear,respectively, below and above the arms of the frame 20, and hence thelatter is vertically adjustable on the supporting standards or columns8, as will be understood. Two of the arms 21 of frame 20 are connectedtogether by a bar 23, which is here shown as an integral portion of theframe or casting and is formed at its center with a bearing 24 for apower-shaft 25, which is provided at its inner end with a detachablepinion 26 and is shown as having a crankwheel 27 at its outer end. Itwill thus be seen that the power-shaft may at any time be slid out ofits bearing, and thus removed, by simply previously detaching the pinion26, which latter may be held upon the shaft by -means of. a set-screwextending through the collar thereofor in any other suitable manner. Theframe or casting 20 is formed with a central segmental opening 28,communicating with the space 28, inclosed between the cross-bar '23 andthe arms 21, connected by said cross-bar, and it has an annular groove2.9 in its inner side or face, from the upper side of which extend slots30, communicating with the upper side of the casting and of which thereare a suitable number disposed at appropriate distances apart. Abearing31 (here shown as forming nearly a complete circle and which ispreferably cast) is adapted to be fitted in the segmental opening 28 ofthe vertically -adjustable frame 20 and is formed with peripheral lugs32, which when theyare disposed coincident with the slots 30 enable thesaid bearing to be placed in or removed from the opening in thevertically-adjustable frame 20, and the said bearing is secured to thesaid vertieallyadjustable "frame 20 by partly turning the same after itslugs have entered the groove 29 through the slots 30, so that the saidlugs bear under the flange formed above said groove 29. A lockpin 33 isthen fitted in registering openings in one of said lugs and in the frame20 to lock the bearing 31 in said frame.

The said bearing 31, which is thus detachably secured to thevertically-adjustable frame 20, bears on the upper end of the revolublegrinding element 14, and the tubular feed-shaft 19 of the latter is journaled in the said bearing and extends upwardly therefrom. Byadjusting the frame 20 on the columns or standards 8 the lower grindingportion of the revoluble 6161116111114 may be caused to bear with anydesirable degree of compression upon the grinding-surface 10 at the baseof the conical fixed grinding element 9. The opening 28 of thevertically-adjustable frame 20 is of greater diameter than the revolublegrinding element,

so that the latter, when the bearing 31 has connected revolubly thereto.

When it is desired to dismember the machine, this may be accomplished byremoving the pin 33 and slightly turning the detachable bearing-plate 31until the lugs 32 of the latter are in alinement with the slots 30. Thepinion 16 is also loosened upon the power-shaft, thus permitting thelatter and the said pinion to be removed. cylinder 14: and thebevel-gear keyed upon the feed-shaft of said cylinder, may then belifted out and removed without disturbing the upper frame 20 of thedevice.

In a machine of this character, which in order to be successfullyoperative must necessarily be of considerable weight, it is extremelydesirable that the construction shall be such that not only said machinemay be The bearing-plate 31, with the quickly and convenientlydismembered to enable it to be conveniently transported to the placewhere it is to be used, which invari-.

ably involves passage over rough and sometimes almost impassable roads,but it is also desirable that when thus dismembered the weight of theparts should be distributed as evenly as possible. It has been found inpractice that with the parts relatively proportioned according to therequirements of a working machine the weights of the parts concernedwill be more nearly equalized by assigning the recess to the base andthe projection to the grinding member, the change in the relativeweights of the elements concerned thus being double the weights actuallytransferred.

Having thus described my invention, I claim- 1. In a quartz-mill, a basehaving a recess, in combination with a grinding member having aprojection detachably engaging said recess.

2. The combination with a base having a non-circular recess, of agrinding member composed of a hollow cone having a frustum shaped lowerend and a non-circular lug ex tending inwardly from the lower edgethereof, said lug engaging the non-circular recess in the base andconnected detachably therewith by means of a fastening member extendingthrough alinin g perforations in said lug and.

base.

3. In a quartz-mill, the combination ofa fixed conlcal grinding element,a revoluble grinding element bearing thereon and having ICC a bore intowhich the fixed conical grinding element extends, and provided furtherwith an upwardly-extending feed-shaft at its upper end,avertically-adjustable frame, having an opening of greater diameter thanthe revoluble grinding element, and abearing in which thefeed-shaft ofthe revoluble grinding element is journaled, said bearing andvertically-adjustable frame having coacting devices, to secure thebearing detachably in said opening, substantially as described.

4. In a quartz-mill, the combination of a fixed conical grindingelement, a revoluble grinding element bearing on and having a bore intowhich the fixed conical grinding element extends, and provided furtherwith an n pwardly-extendin g feed-shaft at its upper engaging the saidbeveled pinion, substantially as described.

5. In a device of .the class described, the

combination of a lower frame, lower and upper grinding members, avertically-adjustable upper frame having an opening andoutwardly-extending arms, a cross-bar connecting two of said arms andhaving a bearing thereon for a power-shaft, abearing-plate engaging theopening of the upper frame, means for securing the said bearing-platedetachably in said opening to revolubly engage the feed-shaft of theupper grinding member and to confine the latter against upward movement,a pinion upon the power-shaft and a gear-wheel upon the feed shaft ofthe upper grinding member.

6. In a device of the class described, the combination of a lowergrinding member, an upper grinding member. a vertically-adjustable upperframe, and a bearing-plate connected detachably with the latter andconfinin g the upward movement of the upper grinding member,substantially as set forth.

7. In a device of the class described, the

combination of the lower grinding member, an upper grinding memberhaving a tubular feed shaft, a vertically adjustable upper frame memberand a bearing-plate connected rotatably and detachably with the latter,revolubly engaging the feed-shaft of the upper grinding member andconfining the latter against upward movement.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

JOHN F. FORWARD.

Witnesses:

WM. R. SPoHN, Ms. D. FORWARD.

